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Finding the Fourth Proportional to 550,781.48, 759,649.92 and 398,391.32

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Solution

The fourth proportional to 550,781.48, 759,649.92 and 398,391.32 is: 549,470.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,781.48 : 759,649.92 = 398,391.32 : x
  2. Step 2: Convert to fraction form
    550,781.48/759,649.92 = 398,391.32/x
  3. Step 3: Cross multiply
    550,781.48x = 759,649.92 × 398,391.32
  4. Step 4: Simplify right side
    550,781.48x = 302,637,934,366.69
  5. Step 5: Solve for x
    x = 302,637,934,366.69/550,781.48
  6. Step 6: Final answer
    x = 549,470.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.